Cover plate for a filter cartridge for a spa or swimming pool water filter



FIG. 1 is a top perspective view of a cover plate for a filter cartridge for a spa or swimming pool water filter showing my new design;

FIG. 2 is a top plan view thereof, on a reduced scale;

FIG. 3 is a front elevation view thereof on a reduced scale, the adjacent sides and rear being identical in appearance; and

FIG. 4 is a right or left side elevation view thereof, on a reduced scale.

The broken line showing of a filter cartridge in FIGS. 3 and 4, is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a cover plate for a filter cartridge for a spa or swimming pool water filter, as shown and described. 